Portable lock



l 1,538,050 J. A. MARK PORTABLE LOCK Filed April 14, 1925 v INVENTOR.JflJVar/I BY W (/3 ATTORNEY.

Patented May 19, 1925.

UNITED STATES JAMES A. MARK, OF MADISON, KANSAS.

PORTABLE LOCK.

Application filed April 14, 1923. Serial No. 632,075.

To all whom it may concern.

Be it known that I, JAMns A. MARK, a citizen of the United States,residing at Madison, in the county of Greenwood and State of Kansas,have invented certain new and useful Improvements in Portable Locks, ofwhich the following is a specification, ref erence being had to theaccompanying drawings.

This invention relates to portable locks and more particularly to ameans attachable to a door or window for locking the same which may bereadily transported from place to place.

An important object of the invention 15 to provide a device of thischaracter which is simple in its construction and arrangement and whichmay be readily applied to a door or window to lock the same.

A further object of the invention is to provide a device of thischaracter which is equally applicable to the fastening, from within aroom, of doors which open inwardly or outwardly of the room.

These and other objects I attain by the construction shown in theaccompanying drawings, wherein for the purpose of illustration is showna preferred embodiment of my invention and wherein Figure 1 is aperspective view showing a device constructed in accordance with myinvention employed to lock an inwardly opening door;

Figure 2 is a transverse sectional view through the stem; and

Figure 3 is a perspective view showing a device constructed inaccordance with my invention employed to lock an outwardly opening door.7

Referring now more particularly to the drawings the numeral 10designates a straight stem which is threaded from one end thereof to apoint adjacent the opposite end thereof. This last named end is providedwith a right-angular extension '11 forming a spike being sharpened sothat it may be readily engaged in woodwork of a door, threshold orframe. The stem is flattened from a point slightly spaced from the firstnamed end thereof and at opposite sides thereof as indicated at 12.

In conjunction with this stem I provide a double nut 13, comprising aplate having formed therethrough adjacent one side edge thereof anopening 15 in which threads are formed for coaction with the threads ofthe stem 10. After being formed the threads are mutilated, as at 16, toprovide spaces for the reception of the threaded portions of the shankbetween the flattened portions 12 thereof. \Vhen the nut is so arrangedupon the stem 10 that the portions 16 thereof align with the threadedportions at the sides of the flattened portions 12, the plate 13 may beslid longitudinally of the stem to be adjusted thereon and may be lockedto the stem by a one-quarter rotation thereof. The opening 15 of thisplate is formed with points spaced from the end edges thereof aconsiderable distance and neck 17 extends upwardly from the plate 13 atthe opposite side thereof from the opening 15 and is provided with anangular extension 18 having a threaded opening therein, indicated at 19,which is likewise adapted for coaction with the threads of the stem 10,the threads of the opening 19 being complete.

In the use of the device to lock a door which opens inwardly to a room,the spike 11 is engaged in the woodwork of the frame at any convenientpoint and the door swung to the closed position, the opening 15 of theplate 14: being disposed adjacent one side edge thereof enables the doorto swing past the plate without engagement with the plate and when thisplate is so positioned that the door may swing by it, it is likewise sopositioned that the portions 16 of the opening are aligned with thethreads of the flattened portions of the stem 12 and accordingly theplate is slidable upon the stem. When the door is closed the plate isslid longitudinally of the stem employing the angular portion 18 as ahandle and when this plate abuts the door the same is rotated to engagethe threads thereof with the threads of the stem, thus preventinglongitudinal movement of the plate 14. upon the stem and since the edgesof the plate when so positioned overlie the door preventing opening ofthe door which in turn serves to prevent withdrawal of the spike 11. Bya similar procedure a window may be locked by the use of this device.

Where a door opens outwardly the spike 11 is engaged in the wood of thedoor at the bottom thereof so that when the door is closed the spike isprevented from withdrawal by the threshold of the door and the stem 10projects into the room, The nut 13 is then applied thereto and a secondstem 10 is g With 1% threaded nd in the With the angular opening 19 ofthe angular extension 18, the spike of this; second-jstem 1Oisthenengaged in the Woodwork of the floor or of the frame of the dooras may be most convenient, as illustrated in Figure 2: This engagementof the second stem serves two functions, that of preventing rotation ofthe plate 14: and

as an anchor preventing movement of the first stem 10 when an attempt ismade to pen. h Q I he o str ct n. he stem the flattened portions12 arepreferably so disposed that when the spike 11 s n ge n he. de fth oorfram the threaded portions. between these flattened portions arevertically disposed. The threads of the. threaded portions of, theopening 15- are likewise preferably aligned portion 10 of the handle, Itwill be obvious that this handlewillhave a e cy to assume a rtica pos ton, with the result that the threads of the open? ing 15 will bemaintained in engagement I With .the threads of the mutilat-ed'portionof the stem and rotation of the plate. 14 due to vibration of thedoor isprevented.

It Will be obvious that. the. construction hcreinbefore; set forth iscapable of; some change and modification without; materiallydeparting-from the spirit. ofmy invention and I accordingly do not limitmyself to such specific structure except as hereinafter claimed.

I claim l, Ina lock; of the. type described, a stem provided at one endwith; a spike disposed at h les eto, the s em being screw-threaded andbeing fiattened from a point adjacent the opposite end to the spikebearing end thereof, and an elongated locking-plate associated With saidstem having 4 point adjacent the opposite end to the spike bearing;- endthereof, and an elongated l king pl t ass c a diwi h said. stemfh inganopeni igfor nedj therein adjacent one n e her he Op ning ing pro:vided with mutilated threads engageable with the threads of. the. stemand alignable with the flattened pontioi s-v thereof, the ds f id openng. being ligned w th the longitudinal axis of.- the plate, and at theopposite end of theplatfi, said platevhaving its opposite end in? theform, of anoffset extension and a. second. threaded opening adapted forthe reception. of. a, second stem similar tothe firstnamed stem. I I

In testimony whereof; L hereunto aflix my signature,

J MES. MAR-SK.

